aecher



2 Sheets-Sheet 1.

(No Model.)

LB. ARCHER.

BOILER FURNACE.

No. 341,628.- Patented May 11, 1886.

a fzarxze (No Model.) 2 shets-sheet 2".

- J. B. ARCHER.

BOILER FUBNAU'E.

No. 341,628. \1 Patented May 11, 1886.

In Vania r;

@70707 2/22 c 7-o7z 07 UNITED STATE PATENT OFFICE.

JOHN B. ARCHER, OF WASHINGTON, DISTRICT OF COLUMBIA.

BOILER-FURNACE.

SPECIFICATION farming part oil etters Patent No. 341,628, dated May 11,1886. Application filed March 11, 1885. Renewed April 12, 1886. 'ierialNo. 198,649. (No model.)

To all whom it may concern.-

Be it known that I, JoHN B. ARCHER, a citizen of theUnited States,residing atVVashington, in the District of Columbia, have inventedcertain' new and useful Improvements in BoilerFurnaces; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to whichitappertains to make and use the same My invention relates to that classof boilerfurnaces in which hydrocarbon vapor or other suitable gas isused as the fuel; and'the nature thereof consists in certainimprovements in the construction of the same and novel combinations ofthe parts thereof hereinafter described and shown.

In the accompanying drawings, in which eorresponding parts aredesignated by similar letters, Figure l is a longitudinal verticalsection of a boiler-furnace having my improvements applied thereto. Fig.2 is a horizontal longitudinal section. Fig. 3 is a transverse verticalsection. Fig. 4 illustrates in detail a curved fire-brick tile upon theunder side of the boiler. Fig. 5 is a flat tile of refractory materialprovided with holes for the reception of posts or pillars of refractorymaterial. Figs. 6 and 7 illustrate a modification of the furnace shownin Fig. 1. Figs. 8 and 9 illustrate the burner.

The cylindrical tubular boiler M has on its under side a curved tile, 0,of fire-brick or other refractory material, which is provided with slotsfor the reception of the upper ends of the posts or pillars K. Theseposts or pillars rest in holes formed in the fiat tile P, and areconstructed of some highly refractory material, so that they may absorband store up the heat generated by combustion. This eombination of theboiler, the tiles 0 and I, and the posts K, is also shown in anotherapplication, Serial No. 159,366, filed by me. The gas or vapor enters bythe pipe B and the air to support combustion by the pipe 0, and bot-h ofthese pipes are provided with valves or stopcocks,to regulate the flowof the fluids through them. A grate, A, is arranged immediately belowthe point at which the gas enters, upon which are placed blocks orbricks of some highly-refraetory material, while above the point atwhich the gas enters are arranged shelves, arches, or projections -R R,also constructed of highly refractory material. Abranch pipe, E,provided with a stop cook or valve for regulating the flow of gas, leadsfrom the main gas-induction pipe to a burner, S,which is supplied withthe requisite amount of air to support combustion from the ainheatingchamberT, formed in the furnace briclcwork. The burner communicatingwith the hot-air chamber T may be arranged in front of the posts orpillars K, as shown in Fig. 1, or in the rear thereof, as shown in Fig.6, and the jets of the burner may be arranged in a vertical direction,as shown in Fig. 6, or in an inclined direction, as-shown in Fig. 1. i

The construction of the burner is best shown in Figs. 8 and 9, in whichV designates the gas-pipe, having a series ofjets,V, and W the air-pipe,provided with a number of cylindrical projections, XV, which surroundand inclose the gas-jets in such a manner as to form annular passagesfor the air. The air entering through the pipe 0 passes downward throughthe passage D, and thence upward through the grate A and refractorymaterial placed thereon,where it meets the gas or-vapor entering throughthe induction-pipe B, and

promotes its combustion. The flame thus generated sweeps in a zigzagdirection about the fire-clay walls, shelves, arches, or projections RIt into the horizontal flue Q.beneath the boiler, and the products ofcombustion after traveling the whole length of the latter pass throughtubular return-fines in the boiler to the smoke-stack. The air enteringthe heatingchamber T passes into the air-tube W, and from thence throughthe annular passages surrounding the branch gas-pipes V, where it comesinto contact with the entering gas and supports its combustion. Theflame thus generated sweeps under the rear portion of the boiler, andthence through the tubular return flue in the boiler to the smoke-stack.1

Having thus described myinvention, Iclaim and desire to secure byLetters Patent- 1. The combination of the boiler, the tiles 0 and I, andthe posts K, as and for the purpose described.

2. The combination of the burner S, the

ICO

5. The combination of thegas and air-induction pipes or fines, theair-heating chamber T, 15 the burner S, and the flue Q, as and for thepurpose described.

In testimony whereof Iaffix my signature in presence of two witnesses.

JOHN B. ARCHER.

\Vitnesses:

O. FRED. KELLER, C. S. WHITMAN.

